Means for promoting the circulation of water in steam-boilers.



H. W. E. JOSLING. MEANS FOR PROMOTING THE CIRCULATION OF WATER IN STEAM BOILERS.

APPLICATION FILED APILI. I9I8.

Patented Oct. 15, 1918...

2 SHEETS-SHEET I.

00000000 00 000 0 00 .00000 3 aooooooo I H. W. E. JOSLING.

MEANS FOR PROMOTING THE CIRCULATION OF WATER IN STEAM BOILERS.

APPLICATION FILED APRJ. 191s.

Patented Oct. 15, 1918..

2 SHEETS-SHEET 2.

FEE i HAROLD W. E. JOSLING, OF WESTMINSTER, LONDON, ENGLAND, ASSIGNOR TOMARINE APPLIANCES LIMITED QOF WESTMINSTER, ENGLAND.

MEANS FOR PROMOTING THE CIRCULATION OF WATER IN STEAM-BOILERS.

Application filed April 1, 1918.

To all whom it may concernf; p

Be it known that LHAROLD VVILLIAM ED- wrN JOSLING, of 39 Victoria street, Westmlnster, in the county of London, England, have invented certain new and useful Improved Means for Promoting the Circulation of Water in Steam-Generators, more Particularly Boilers of the Scotch Marine Type; and I do hereby declare the follow ing to be a full, clear and exact description of the invention, such as will enable others skilled in the art to whichit appertains to make and use the same. p

p This invention relates tonieansfor promoting the circulation'of water in boilers of the Scotch marine type having a plurality of furnaces with their flues and nests of smoke tubes.

Means for promoting longitudinal circulation of water in steam boilers of the above type have been proposed such circulating means consisting of hoods or deflector plates fixed above and at the back and front of the combustion chambers, such deflector plates in some instances being provided with side wings. It hasalsobeen proposed to employ deflector plates at the opposite end of the boiler and also between the smoke tubes to direct the current.

It has been found that the circulation set up by the above known. means can be very considerably improved and the obiect of this invention is to provide improved circulating apparatus of the general tvpe above mentioned. the apparatus according to this invention being however so constructed that the circulation can be clirectedtso as to in sure the circulating water rapidly and continuously reaching and passing every part of the boilerbelow the steam space.

In this invention a deflector plateu is placed over the water space at the rear of the combustion chambers, the lower end of this deflector plate being in contact or almost in contact with the end of the boiler from which the plate slopes or curves upwardly so as to proiect forward some distance over the dog stays on the top of the combustion chambers; this plate extends from side to side of the shell of the boiler, and is not provided or fitted with side wings.

In front of the combustion chamber directly above the smoke tubes is placed the of an upcirculating hood which consists extendmg Specification of Letters IPatent.

furnace chambers.

of smoke tubes appertaining respectively to Patented Oct. 15, 1918. Serial No. 226,001.

the full width of the combustion chambers, I

such hood being provided with depending wings or side pieces which may reach to or approximately to the lower row of smoke tubes; the forward or outlet end of this hood is fitted at or near one side with a directing piece or plate the object of this being to direct the current at a Suitable angle across the boiler and thus allow the return current to flow along one side of the boiler as well as along the bottom and at the same time insuring a reater outward flow along the other side of the boiler, whereby checking of the current is prevented and efficient circulation is set up throughout the entire body. of water in the boiler.

In the accompanying drawings which illustrate circulating apparatus according to this invention Figure 1 is a front elevation-of so much of a marine boiler as is necessary to illustrate the'apparatus. according to this invention.

Fig. 2 is a plan view of Fig. 1 but with the upper portion of the boiler shell omitted.

F ig. 3 is a sectional elevation on the line A'B Fig. 1..

Fig. 4 is a sectional elevation of a marine boiler with circulating apparatus according to this invention and shows approximately the course taken bv the water in its outward :andreturn flow from the circulating apparatus. j

Fig. 5 is a detail view. in front. elevation and on a larger scale. of the means for se curin the directing plate to the longitudinal boiler stay as shown in Figs. 1 and 2 and hereinafter described.

Fig. 6 is a plan view of Fig. 5. 1.is the shell of the boiler, 2. 3. andil the Y and 5. 6 and 7 the nests the furnace chambers 2, 3 and 4. 8 are the usual longitudinal stays of the boiler. It will be understood that there is as usual a large flue for each furnace chamber. these flues being. as usual. situated below the nests of smoke tubes. 9 is the hereinbefore mentioned deflector plate over the water space at the rear of the combustion chambers this plate asshown extending completely across the boiler from one side to the other and sloping downwardly to the back plate or end of the boiler as shown in Fig. 3. 10 is the hereinbefore mentioned circulating hood situated in front of the combustion chambers and directly above the nests of smoke tubes 5, 6 and '7, this hood consisting, as shown, of a number of overlapping plates which may be suitably secured together, for instance, by bolts, the said hood sloping upwardly and forwardly to a suitable distance from the front of the combustion chambers. The deflector plate 9 is similarly built up of a number of overlapping plates. As shown the hood 10 extends across the combustion chambers and the spaces between the said chambers and is provided at its opposite sides with depending wings or side plates 11, 12 which as shown terminate with their lower edges near the lowermost horizontal row of smoke tubes. 18 is the hereinbefore mentioned directing piece or plate which at its rear end or edge is secured to the forward end of the hood 10 at or adjacent one side thereof the top or upper edge of the plate 18 being situated at about the level of the lower longitudinal boiler stays 8; this directing plate 13 is, as shown, set at a suit able angle to the longitudinal center line of the boiler and extends a suitable distance forwardly from the hood.

As shown the circulating hood 10 is supported by means of hook bolts 1a the upper ends of which engage the lower boiler stays 8, and the lower ends of which extend through the plates forming the hood 10 and are secured thereto by nuts as shown. The directing plate 13 is secured to two of the lower boiler stays by means of a bar or strap 15 resting on the said stays and held thereon by means of hook bolts and nuts 16 the outer or right hand end of the said bar or strap 15 being secured, for instance bolted to a flange 13 formed or provided on the top or upper edge of the directing plate 18 at or near the forward end thereof. The forward horizontal or substantially horizontal portion of the deflector plate 9 is also secured to the lower boiler stays 8 by hook bolts in a similar manner to that described with reference to the hook bolts 14: supporting the hood 10.

menses The deflector plate 9 extending completely across the boiler, from one side of the boiler barrel to the other, prevents water being thrown up the sides of the boiler barrel, in rear of the combustion chambers, on to the top of the deflector plate.

hat I claim as my invention and to secure by Letters Patent is 1. The combination, with a boiler provided with a plurality of combustion chambers each having a set of fire tubes; of a hood formed of a continuous plate having its rear edge arranged adjacent to the front desire ends of the said combustion chambers and extending upwardly and forwardly over all the sets of tubes and having downwardly projecting wings at its sides arranged in the water spaces between the tubes and the side walls of the boiler, and a directing plate secured adjacent to one of the wings of the hood and extending forwardly thereof and diagonally of and above the adjacent fire tubes.

2. The combination, with a boiler pro vided with a plurality of combustion chambers each ha ing a set, of fire tubes; of ahood formed of a continuous plate having its front edge arranged adjacent to the rear ends of the said combustion chambers and extending upwardly and forwardly over all the sets of tubes and having downwardly projecting wings at its sides arranged in the water spaces between the tubes and the side walls of the'boiler, adirecting plate arranged adjacent to one of the wings of the hood and extending forwardly thereof and diagonally of and above the adjacent lire tubes, and a second hood having its rear edge arranged adjacent to the rear wall of the boiler and extending upwardly and forwardly over the rear end portions of all the said combustion chambers.

In testimony whereof I have aflixed my signature, in presence of two witnesses.

H. "W. E. JOSLING. Witnesses:

J. Groom,

PETER Venn.

topics of this patent may be obtained for five cents each, "my addressing the @ommissioner or 'Eatents, Washington, Q. 

